Creating Replication and High Availability Cloud Scenarios › Working with Arcserve RHA High Availability Cloud Scenarios

Working with Arcserve RHA High Availability Cloud Scenarios

The Full System High Availability to EC2 feature is an extension to the existing Full System scenario type where Arcserve RHA enables high availability of an entire Windows system into a VM running on Microsoft Hyper-V, Citrix Xen, or VMware ESX Hypervisor. The Full System High Availability to EC2 feature extends the list of supported virtual environments by adding support for Amazon EC2.

Using the Scenario Creation Wizard to create a Full System High Availability EC2 scenario is the same as creating a non-cloud High Availability scenario, with the following exceptions:

• In the Master/Replica Hosts Assignments pane, after you have assigned the master host, select the Amazon EC2 server type in the Replica Settings section. Select the EC2 replica instance (appliance).
• In the Master and Replica Properties screen, a new Cloud section is available. All of the properties are read-only except the Clean up Cloud Resources When Remove Scenario property that is disabled by default.
• In the Switchover Properties screen, from a connectivity perspective, VPC is a separate network and therefore the only redirection method that can be used for switchover is Redirect DNS. Currently all of the redirection methods are disabled by default, which means that during failover the EC2 replica appliance will create an EC2 recovery instance without redirecting traffic to it. If traffic redirection is required, then you have to enable the Redirect DNS option.

  Notes:

  • The Physical Network Mappings option designates the VPC subnetwork where the recovery instance will be started should Failover or Switchover occur. The Scenario Creation Wizard creates default mapping, but you can change the VPC subnets if needed.
  • Information about available VPC subnets is retrieved by CS from the EC2 replica appliance at scenario creation time. Then the EC2 replica appliance communicates with the EC2 API server, which can change depending on the VPC region in which it is located. This imposes the following requirements:
    • Appliance instances running in VPC should have access to the internet (your network administrator should enable the corresponding routing rules).
    • Appliance instances should have a proper DNS server set so the IP addresses of EC2 API servers can be resolved.
  • For more information about creating high availability scenarios, see Creating Replication and High Availability Scenarios.